There are two possible reasons that you can look into why the MA-180 does not receive any messages:

- The connection software that was installed with the drivers might intercept the messages before Diafaan SMS Server can read them. Maybe there is an option in the connection software to prevent reading the messages, or you can close the connection software entirely.

- It is also possible that the MA-180 stores the messages in a memory location where Diafaan SMS Server does not look. You can try setting the MA-180 "ModemInitialization" in the Advanced properties of the GSM Modem Gateway to one of the following values:
AT+CPMS="ME","ME","ME"
or
AT+CPMS="MT","MT","MT"